existence可数吗?
existence是可数名词，意思是存在、存在物。复数是existences.
The existences of these problems have affected the effectiveness of teaching.
这些问题的存在已经影响了课堂教学的实效性。
Surely my existence cannot be so purposeless?
想必，我的存在不可能如此毫无意义吧？
She felt estranged from her former existence.
她感到自己已脱离了过去的生活方式。
She contemplated the sterility of her existence.
她思量着自己空虚无聊的生活。
We led a poor but happy enough existence as children.
我们儿时的生活虽然贫穷却过得很愉快。
Her career is the be-all and end-all of her existence.
她的事业是她生活中一切的一切。
